Test E: Wipers Inoperative At Interval Setting
WARNING: This page is about a different car, the 1997 Lincoln Mark VIII. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition on. Set wiper switch for low speed operation. If wipers work at low speed, go to next step. If wipers do not work at low speed, go to TEST D.
- Turn ignition off. Disconnect Interval Wiper/Washer Module (IWWM) wiper connector. IWWM is located behind instrument panel, to left of steering column. Set wiper switch at Interval (INT) setting. Measure resistance between terminal No. 7 (Brown/White wire) and terminal No. 1 ()Orange wire) at IWWM harness connector. See Figure . If resistance is 10,500-12,000 ohms, go to next step. If resistance is not 10,500-12,000 ohms, replace multifunction switch and retest system.
- Set the interval control to any interval setting. Measure resistance between Brown/White wire and Dark Blue/White wire terminals at multifunction switch. If resistance is not 3300-103,300 ohms, go to next step. If resistance is 3300-103,300 ohms, replace IWWM and retest system.
- Measure resistance of Dark Blue/White wire between IWWM connector and ground. If resistance is 10 k/ohms or less, go to next step. If resistance is greater than 10 k/ohms, go to step 6).
- Disconnect multifunction switch harness connector. Measure resistance of Dark Blue/White wire between IWWM connector and ground. If resistance is 10 k/ohms or less, repair short to ground in Dark Blue/White wire. If resistance is greater than 10 k/ohms, replace multifunction switch. After repair, retest system.
- Disconnect multifunction switch connector. Measure resistance of Dark Blue/White wire between IWWM connector and multifunction switch connector. If resistance is 5 ohms or less, replace multifunction switch. If resistance is greater than 5 ohms, repair open in Dark Blue/White wire. After repair, retest system.